clear running light bulbs
Here is a breakdown of part numbers and what they mean.
3157 ----- Clear
3157A ---- Amber (the glass is coated/painted. the color will fade over time)
3157NA --- Natural Amber (the glass is actually amber in color and will not fade. they are also richer in color)
3157R ----- Red (the glass is coated/painted. I dont know if there is a red glass version)
Front turn signals are required to be amber though. Since the front DRLs on the Formula are also the turn signals, stick with the 3157NA bulbs.
Copy and paste from my post in this recent thread:
https://ls1tech.com/forums/showthrea...highlight=3157
You might also find a 3157B (blue) but that is definately illegal.
They also sell the 194 bulb in chrome as well. And yes it too lights up amber.
They are just not "white" enough. I have white LED bulbs for teh side markers..but the fronts always look dull.
And you can get what they call stealth bulbs which might be what some of the other posters are talking about. They dont emit an orange/amber color when off, but when on they do. I believe either PFYC or Afterthoughts carries them. I know Ive seen them on a sponsers site before tho.







